B/W. 4inch CRT screen Hand free, visitor calling, video intercom, unlock, monitor. With warning function. AV output, it can connect image recorder. CMOS camera. With LED lights. Two wire connection. Specification: Power supply:DC16V Effective Resolution:≥420 Lines Operation temperature:-15°C??0°C Dimension: Monitor225(L)*170(W)*52(H)mm Camera:127(L)*95(W)*35(H)mm Including: One monitor, one outdoor unit one user manual, one steel for wall mount, screws, 3meters cable, one AV cable, one power adapter. Packing detail: Carton size: 41.6*33.5*25.5cm 6sets in one carton GW: 12.7kgs Match way: one to one, one to two CE approval